nginx 301 hidden forwarding

Question

I found this when I was browsing Taobao recently. There is a product for 301 forwarding.

What is it calledHidden forwarding in the whole site
The effect is:
For example, my website is b.com
But the forwarding is set to a.com

When visiting the a.com/index.html page
In fact, the access is b.com/index.html
And the url displayed by the browser is a.com/index.html

How to do this.

I know that it is possible to do nginx reverse proxy proxy_pass.

But it seems that you have to use nginx traffic, and the speed must be slow.
Is there any other way?

Answer 1

First of all, you need to understand what http 301 is. This return code is given to the browser, and then the browser re-initiates a request to access the new address.
This is stipulated by the http protocol. How can you get around it unless you make a browser yourself. . .

Answer 2

No.